CN102061152A - High-strength controllable gel breaking chemical temporary plugging liquid rubber plug - Google Patents

High-strength controllable gel breaking chemical temporary plugging liquid rubber plug Download PDF

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Publication number
CN102061152A
CN102061152A CN2009102378146A CN200910237814A CN102061152A CN 102061152 A CN102061152 A CN 102061152A CN 2009102378146 A CN2009102378146 A CN 2009102378146A CN 200910237814 A CN200910237814 A CN 200910237814A CN 102061152 A CN102061152 A CN 102061152A
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water
liquid gum
gum plug
broken gel
high controlled
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CN2009102378146A
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CN102061152B (en
Inventor
邱晓惠
崔明月
胥云
丁云宏
王振铎
管宝山
刘萍
杨艳丽
梁丽
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Petrochina Co Ltd
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Petrochina Co Ltd
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Abstract

The invention relates to a high-strength controllable gel breaking chemical temporary plugging liquid rubber plug, which is characterized in that: the cross-linking agent is prepared by solution cross-linking polymerization of amphoteric polyacrylamide, cationic monomer, anionic monomer, cross-linking agent and initiator in water according to the weight ratio of 0.3-1: 6-12: 1-5: 0.02-0.06: 81.9-93 to water; the liquid rubber plug can resist 60 ℃ and the gelling time can be adjusted within 2-50min, can bear the fracturing construction pressure difference of more than 15MPa, can replace a mechanical packer to effectively plug a target layer and then carry out conventional fracturing construction, and can control the gel breaking hydration within the required time.

Description

The temporarily stifled liquid gum plug of the high controlled broken gel of a kind of intensity
Technical field
What the present invention relates to is a kind of in the horizontal well in segments frac job, can replace mechanical packer to play the temporarily stifled liquid gum plug of the high controlled broken gel of intensity of bridge plugging effect.
Background technology
In the staged fracturing of horizontal well, some well can't use mechanical packer to carry out packing because perforated interval is oversize or produce oil gas-bearing formation spacing is too little, also have the special construction of well section, mechanical packer can not be carried out the packing effect at zone of interest, and these wells can't be finished the staged fracturing transformation.A kind of temporarily stifled liquid gum plug of the controlled broken gel of high strength that is used for the horizontal well in segments pressure break can replace the accurate shutoff zone of interest of mechanical packer, has good ultimate compression strength, after finishing, pressing crack construction can break glue automatically, for the horizontal well transformation provides a kind of new chemical temporary blocking method.
In technology in the past, " liquid gum plug packing agent " (CN1182112A), " agent of high temperature resistance completion temporary blocking " (CN1047686A) is to use sesbania gum and melon glue powder in the vegetable jelly is raw material, adopting titanium tetrachloride and potassium bichromate is linking agent, gain in strength by back-up sand in the construction, and the temporary plugging agent that can only in straight well, use.
Summary of the invention
The purpose of this invention is to provide a kind of broken glue may command of glue that becomes in 60 degree, heat resistance is good, the energy bearing certain pressure, little to reservoir damage, without back-up sand, can replace mechanical packer packing reservoir, after carrying out pressing crack construction, horizontal well target well section can break the chemical plugging agent of glue automatically.
The temporarily stifled liquid gum plug of the controlled broken gel of high strength that is used for the horizontal well in segments pressure break of the present invention is to be mixed with supporting gel breaker by high molecular polymer, under linking agent and initiator effect, and the polymerization synthetic.
The present invention mentions pass through crosslinking polymerization form high molecular polymer be by amphiprotic polyacrylamide, cationic monomer, anionic monomer, linking agent, initiator according to the weight ratio 0.3-1 of water: the ratio of 6-12: 1-5: 0.02-0.06: 0.02-0.06: 81.9-93 is carried out solution crosslinking and is polymerized in water.
The molecular weight of amphiprotic polyacrylamide is 500-1400 ten thousand, and wherein: cation concn accounts for the 5-10% of amphiprotic polyacrylamide total mass, and anion concentration accounts for the 10-20% of amphiprotic polyacrylamide total mass.Example has: a kind of in the great waves technology development co. patent CN1995270A product wishes in STP-2, HENGFLOC 50809, HENGFLOC 50812, Beijing of the permanent dimerization in Beijing company.
Cationic monomer has: one or more in dimethyl diallyl ammonia chloride, acrylyl oxy-ethyl-trimethyl ammonia chloride (DAC), the methylacryoyloxyethyl trimethylammonium ammonia chloride (DMC) etc.
The example of anionic monomer has: one or more in acrylamide, Methacrylamide, vinyl cyanide, sodium acrylate, vinylformic acid, methacrylic acid, the acrylamido methyl propane sulfonic acid (AMPS) etc.
Linking agent has: PEI resin, C10-30 alkyl acrylic fat, one or more in the NN-methylene-bisacrylamide.
Initiator has: Sulfothiorine, Potassium Thiosulphate, ammonium persulphate, Sodium Persulfate, Potassium Persulphate, one or more in the hydrogen peroxide.
Oxygen scavenger has: S-WAT, and potassium sulfite, one or more in the sodium bisulfite are adjusted consumption according to the weight ratio of water quality situation and water in 0.02-0.08%.
The temporarily stifled liquid gum plug of the controlled broken gel of high strength formed according to the present invention, gelation time can be controlled in the 2-50min, plug can be by the broken automatically glue of gel breaker effect in 4-72h, breaking glue solution viscosity is less than 5mpa.s, to reservoir damage less than 15%, ultimate compression strength is greater than 15MPa, and use temperature is 20-70 ℃.Finished three sections of shutoff at the scene, oil field, the liquid gum plug shutoff pressing crack construction that pressure break is four sections, pressure is 23-38MPa during construction, played oil pipe in 48 hours after construction is finished and begin normal pressing crack construction operation, increase additional pulling force, return discharge opeing viscosity less than 5mpa, s presses back output by 1m 3Be increased to 18m 3
The present invention constructs by lab and field, prove that preparation is convenient, control easily, strong, the broken glue of anti-pressure ability fast, characteristics such as construction is simple.
Embodiment
Embodiment 1
In the time of 30 ℃, the weight ratio of each component and water: STP-2:: acrylamide: methylacryoyloxyethyl trimethylammonium ammonia chloride (DMC): NN-methylene-bisacrylamide: Potassium Persulphate: S-WAT: water=0.6: 10: 1: 0.05: 0.05: 0.05: 89.
Base fluid preparation: add 0.6%STP-2 at the water that stirs, add 10% acrylamide, 0.1% methylacryoyloxyethyl trimethylammonium ammonia chloride again behind the stirring 15min, left standstill swelling after stirring 4 hours, liquid viscosity 15mpa.s.
Crosslinked fluid preparation: in water, add the 1%NN-DMAA, stir and place dissolving.
Initiator liquid preparation: in water, add 10% Sodium Persulfate, stir and place dissolving.
Oxygen scavenger liquid preparation: in water, add 1% S-WAT, stir and place dissolving.
The liquid gum plug preparation: add crosslinked fluid 5ml respectively in the 1000ml base fluid, add initiator liquid 5ml, add oxygen scavenger liquid 5ml, place the back that stirs fast, and liquid begins tackify when 12min, and 20min becomes the glue deformable, and the 50min colloid is non-deformable.
Embodiment 2
In the time of 30 ℃, the weight ratio of each component and water: STP-2:: sodium acrylate: dimethyl diallyl ammonia chloride: NN-DMAA: Sodium Persulfate: S-WAT: water=0.8: 10: 1: 0.03: 0.05: 0.05: 89.
Base fluid preparation: mix in the accent device cup at 1500ml, add cleaning water 882g, under the rotating speed of 100 commentaries on classics/min, add 8g STP-2, add the 100g sodium acrylate again after stirring 15min, add 10g methylacryoyloxyethyl trimethylammonium ammonia chloride again, pour into after stirring and left standstill swelling in the 1000ml beaker 4 hours, liquid viscosity 36mpa.s.
Crosslinked fluid preparation: in the 100ml beaker, add NN-DMAA 1g, stir and place dissolving.
Initiator preparation: in the 50ml beaker, add Sodium Persulfate 5g, stir and place dissolving.
Oxygen scavenger preparation: in the 100ml beaker, add S-WAT 1g, stir and place dissolving.
The liquid gum plug preparation: add crosslinked fluid 3ml respectively in the 1000ml base fluid, add initiator 5ml, add oxygen scavenger 5ml, place the back that stirs fast, and liquid begins tackify when 17min, and 30min becomes the glue deformable, and the 50min colloid is non-deformable.
Embodiment 3
In the time of 30 ℃, the weight ratio of each component and water: STP-2:: acrylamide: vinylformic acid: NN-methylene-bisacrylamide: Sodium Persulfate: sodium bisulfite: water=0.8: 8: 1: 0.03: 0.03: 0.05: 90.Liquid viscosity 36mpa.s.
Base fluid is prepared: mix at 1500ml and transfer in the device cup, add cleaning water 892g, under the rotating speed of 100 commentaries on classics/min, add 8g STP-2, add 80g sodium acrylate and 10g vinylformic acid again behind the stirring 15min, pour into after stirring and left standstill swelling in the 1000ml beaker 4 hours.
Crosslinked fluid preparation: in the 100ml beaker, add NN-DMAA 1g, stir and place dissolving.
Initiator liquid preparation: in the 50ml beaker, add Sodium Persulfate 5g, stir and place dissolving..
Oxygen scavenger liquid preparation: in the 100ml beaker, add S-WAT 1g, stir and place dissolving.
The liquid gum plug preparation: add crosslinked fluid 3ml respectively in the 1000ml base fluid, add initiator liquid 3ml, add oxygen scavenger liquid 5ml, place the back that stirs fast, and liquid begins tackify when 20min, and 40min becomes the glue deformable, and the 50min colloid is non-deformable.

Claims (7)

1. the high controlled broken gel of an intensity is blocked up liquid gum plug temporarily, it is characterized in that: by amphiprotic polyacrylamide, cationic monomer, anionic monomer, linking agent, initiator according to the weight ratio 0.3-1 of water: the ratio of 6-12: 1-5: 0.02-0.06: 0.02-0.06: 81.9-93 is carried out solution crosslinking and is polymerized in water.
2. the temporarily stifled liquid gum plug of the high controlled broken gel of intensity according to claim 1, it is characterized in that: the amphiprotic polyacrylamide molecular weight is at 500-1400 ten thousand, wherein: cation concn accounts for the 5-10% of amphiprotic polyacrylamide total mass, and anion concentration accounts for the 10-20% of amphiprotic polyacrylamide total mass.
3. the temporarily stifled liquid gum plug of the high controlled broken gel of intensity according to claim 1, it is characterized in that: cationic monomer is: one or more in dimethyl diallyl ammonia chloride, acrylyl oxy-ethyl-trimethyl ammonia chloride, the methylacryoyloxyethyl trimethylammonium ammonia chloride.
4. the temporarily stifled liquid gum plug of the high controlled broken gel of intensity according to claim 1, it is characterized in that: anionic monomer is: one or more in acrylamide, Methacrylamide, vinyl cyanide, sodium acrylate, vinylformic acid, methacrylic acid, the acrylamido methyl propane sulfonic acid.
5. the temporarily stifled liquid gum plug of the high controlled broken gel of intensity according to claim 1, it is characterized in that: linking agent is the PEI resin, C10-30 alkyl acrylic fat, one or more in the NN-methylene-bisacrylamide.
6. the temporarily stifled liquid gum plug of the high controlled broken gel of intensity according to claim 1, it is characterized in that: initiator is: Sulfothiorine, Potassium Thiosulphate, ammonium persulphate, Sodium Persulfate, Potassium Persulphate, one or more in the hydrogen peroxide.
7. the temporarily stifled liquid gum plug of the high controlled broken gel of intensity according to claim 1, it is characterized in that: oxygen scavenger is: S-WAT, potassium sulfite, one or more in the sodium bisulfite are adjusted consumption according to the weight ratio of water quality situation and water in 0.02-0.08%.
CN200910237814.6A 2009-11-11 2009-11-11 High-strength controllable gel breaking chemical temporary plugging liquid rubber plug Active CN102061152B (en)

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CN103547766A (en) * 2011-05-19 2014-01-29 贝克休斯公司 Easy drill slip with degradable materials
CN104178102A (en) * 2014-05-16 2014-12-03 成都佰椿石油科技有限公司 Cross-linkable high-temperature-resistant residue-free polybasic copolymerizable fracturing fluid and preparation method thereof
CN104327814A (en) * 2014-09-19 2015-02-04 山东瑞特精细化工有限公司 Polyacrylamide plugging agent and preparation method thereof
CN104403658A (en) * 2014-12-08 2015-03-11 中国石油大学(华东) High-temperature-resistant crosslinking acid liquor system as well as preparation method thereof
CN105089599A (en) * 2014-05-08 2015-11-25 中国石油化工股份有限公司 Device and method for immovable string hydraulic sand blasting and fracturing
CN106321050A (en) * 2015-06-30 2017-01-11 中国石油化工股份有限公司 High efficiency fracturing method using coiled tubing water-jet and soluble rubber plugs
CN108505982A (en) * 2018-02-27 2018-09-07 中国石油天然气股份有限公司 Old well repeated fracturing production increase method for realizing temporary plugging steering by adopting liquid rubber plug
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CN109403913A (en) * 2018-10-09 2019-03-01 中国石油天然气股份有限公司 Repeated transformation method for improving temporary plugging effect of seam end
CN109536145A (en) * 2018-12-03 2019-03-29 中国石油集团川庆钻探工程有限公司 Water-soluble temporary plugging agent for fracturing and synthesis method thereof
CN109554173A (en) * 2018-12-18 2019-04-02 通辽市宝林矽砂有限责任公司 A kind of temporary plugging diversion agent for refracturing of oil-water well and preparation method thereof
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CN112302604A (en) * 2019-07-31 2021-02-02 中国石油化工股份有限公司 Horizontal well subsection repeated fracturing method and application thereof
CN112457450A (en) * 2020-11-16 2021-03-09 西安石油大油气科技有限公司 Amphoteric temporary plugging agent and preparation method thereof
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